-const char jcc_rcs[] = "$Id: jcc.c,v 1.1.1.1 2001/05/15 13:58:56 oes Exp $";
+const char jcc_rcs[] = "$Id: jcc.c,v 1.5 2001/05/22 18:46:04 oes Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
*
* Revisions :
* $Log: jcc.c,v $
+ * Revision 1.5 2001/05/22 18:46:04 oes
+ *
+ * - Enabled filtering banners by size rather than URL
+ * by adding patterns that replace all standard banner
+ * sizes with the "Junkbuster" gif to the re_filterfile
+ *
+ * - Enabled filtering WebBugs by providing a pattern
+ * which kills all 1x1 images
+ *
+ * - Added support for PCRE_UNGREEDY behaviour to pcrs,
+ * which is selected by the (nonstandard and therefore
+ * capital) letter 'U' in the option string.
+ * It causes the quantifiers to be ungreedy by default.
+ * Appending a ? turns back to greedy (!).
+ *
+ * - Added a new interceptor ijb-send-banner, which
+ * sends back the "Junkbuster" gif. Without imagelist or
+ * MSIE detection support, or if tinygif = 1, or the
+ * URL isn't recognized as an imageurl, a lame HTML
+ * explanation is sent instead.
+ *
+ * - Added new feature, which permits blocking remote
+ * script redirects and firing back a local redirect
+ * to the browser.
+ * The feature is conditionally compiled, i.e. it
+ * can be disabled with --disable-fast-redirects,
+ * plus it must be activated by a "fast-redirects"
+ * line in the config file, has its own log level
+ * and of course wants to be displayed by show-proxy-args
+ * Note: Boy, all the #ifdefs in 1001 locations and
+ * all the fumbling with configure.in and acconfig.h
+ * were *way* more work than the feature itself :-(
+ *
+ * - Because a generic redirect template was needed for
+ * this, tinygif = 3 now uses the same.
+ *
+ * - Moved GIFs, and other static HTTP response templates
+ * to project.h
+ *
+ * - Some minor fixes
+ *
+ * - Removed some >400 CRs again (Jon, you really worked
+ * a lot! ;-)
+ *
+ * Revision 1.4 2001/05/21 19:34:01 jongfoster
+ * Made failure to bind() a fatal error.
+ *
+ * Revision 1.3 2001/05/20 01:21:20 jongfoster
+ * Version 2.9.4 checkin.
+ * - Merged popupfile and cookiefile, and added control over PCRS
+ * filtering, in new "permissionsfile".
+ * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
+ * file error you now get a message box (in the Win32 GUI) rather
+ * than the program exiting with no explanation.
+ * - Made killpopup use the PCRS MIME-type checking and HTTP-header
+ * skipping.
+ * - Removed tabs from "config"
+ * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
+ * - Bumped up version number.
+ *
+ * Revision 1.2 2001/05/17 22:34:44 oes
+ * - Added hint on GIF char array generation to jcc.c
+ * - Cleaned CRLF's from the sources and related files
+ * - Repaired logging for REF and FRC
+ *
* Revision 1.1.1.1 2001/05/15 13:58:56 oes
* Initial import of version 2.9.3 source tree
*
static void listen_loop(void);
static void chat(struct client_state *csp);
+#ifdef AMIGA
+void serve(struct client_state *csp);
+#else /* ifndef AMIGA */
static void serve(struct client_state *csp);
+#endif /* def AMIGA */
+
#ifdef __BEOS__
static int32 server_thread(void *data);
#endif /* def __BEOS__ */
-
-#define BODY "<body bgcolor=\"#f8f8f0\" link=\"#000078\" alink=\"#ff0022\" vlink=\"#787878\">\n"
-
-static const char CFAIL[] =
- "HTTP/1.0 503 Connect failed\n"
- "Content-Type: text/html\n\n"
- "<html>\n"
- "<head>\n"
- "<title>Internet Junkbuster: Connect failed</title>\n"
- "</head>\n"
- BODY
- "<h1><center>"
- BANNER
- "</center></h1>"
- "TCP connection to '%s' failed: %s.\n<br>"
- "</body>\n"
- "</html>\n";
-
-static const char CNXDOM[] =
- "HTTP/1.0 404 Non-existent domain\n"
- "Content-Type: text/html\n\n"
- "<html>\n"
- "<head>\n"
- "<title>Internet Junkbuster: Non-existent domain</title>\n"
- "</head>\n"
- BODY
- "<h1><center>"
- BANNER
- "</center></h1>"
- "No such domain: %s\n"
- "</body>\n"
- "</html>\n";
-
-static const char CSUCCEED[] =
- "HTTP/1.0 200 Connection established\n"
- "Proxy-Agent: IJ/" VERSION "\n\n";
-
-static const char CHEADER[] =
- "HTTP/1.0 400 Invalid header received from browser\n\n";
-
-static const char SHEADER[] =
- "HTTP/1.0 502 Invalid header received from server\n\n";
-
-#if defined(DETECT_MSIE_IMAGES) || defined(USE_IMAGE_LIST)
-
-/*
- * Hint: You can encode your own GIFs like that:
- * perl -e 'while (read STDIN, $c, 1) { printf("\\%.3o,", unpack("C", $c)); }'
- */
-
-static const char BLANKGIF[] =
- "HTTP/1.0 200 OK\r\n"
- "Pragma: no-cache\r\n"
- "Last-Modified: Thu Jul 31, 1997 07:42:22 pm GMT\r\n"
- "Expires: Thu Jul 31, 1997 07:42:22 pm GMT\r\n"
- "Content-type: image/gif\r\n\r\n"
- "GIF89a\001\000\001\000\200\000\000\377\377\377\000\000"
- "\000!\371\004\001\000\000\000\000,\000\000\000\000\001"
- "\000\001\000\000\002\002D\001\000;";
-
-static const char JBGIF[] =
- "HTTP/1.0 200 OK\r\n"
- "Pragma: no-cache\r\n"
- "Last-Modified: Thu Jul 31, 1997 07:42:22 pm GMT\r\n"
- "Expires: Thu Jul 31, 1997 07:42:22 pm GMT\r\n"
- "Content-type: image/gif\r\n\r\n"
- "GIF89aD\000\013\000\360\000\000\000\000\000\377\377\377!"
- "\371\004\001\000\000\001\000,\000\000\000\000D\000\013\000"
- "\000\002a\214\217\251\313\355\277\000\200G&K\025\316hC\037"
- "\200\234\230Y\2309\235S\230\266\206\372J\253<\3131\253\271"
- "\270\215\342\254\013\203\371\202\264\334P\207\332\020o\266"
- "N\215I\332=\211\312\3513\266:\026AK)\364\370\365aobr\305"
- "\372\003S\275\274k2\354\254z\347?\335\274x\306^9\374\276"
- "\037Q\000\000;";
-
-static const char FWGIF[] =
- "HTTP/1.0 302 Blocked Advert\r\n"
- "Pragma: no-cache\r\n"
- "Last-Modified: Thu Jul 31, 1997 07:42:22 pm GMT\r\n"
- "Expires: Thu Jul 31, 1997 07:42:22 pm GMT\r\n"
- "Location: ";
-
-#endif /* defined(DETECT_MSIE_IMAGES) || defined(USE_IMAGE_LIST) */
-
#ifdef _WIN32
#define sleep(N) Sleep(((N) * 1000))
#endif
*********************************************************************/
static void chat(struct client_state *csp)
{
+/* This next line is a little ugly, but it simplifies the if statement below. */
+/* Basically if TOGGLE, then we want the if to test "csp->toggled_on", else we don't */
+#ifdef TOGGLE
+# define IS_TOGGLED_ON csp->toggled_on &&
+#else /* ifndef TOGGLE */
+# define IS_TOGGLED_ON
+#endif /* ndef TOGGLE */
+
+/* This next line is a little ugly, but it simplifies the if statement below. */
+/* Basically if TRUST_FILES, then we want the if to call "trust_url", else we don't */
+#ifdef TRUST_FILES
+# define IS_TRUSTED_URL (p = trust_url(http, csp)) ||
+#else /* ifndef TRUST_FILES */
+# define IS_TRUSTED_URL
+#endif /* ndef TRUST_FILES */
+
char buf[BUFSIZ], *hdr, *p, *req;
char *err = NULL;
char *eno;
fd_set rfds;
int n, maxfd, server_body, ms_iis5_hack = 0;
- struct cookie_spec *cs;
const struct gateway *gw;
struct http_request *http;
+#ifdef KILLPOPUPS
+ int block_popups; /* bool, 1==will block popups */
+ int block_popups_now = 0; /* bool, 1==currently blocking popups */
+#endif /* def KILLPOPUPS */
#ifdef PCRS
- int filtering = 0;
+ int pcrs_filter; /* bool, 1==will filter through pcrs */
+ int filtering = 0; /* bool, 1==currently filtering through pcrs */
#endif /* def PCRS */
http = csp->http;
if(strstr(req, FORCE_PREFIX))
{
strclean(req, FORCE_PREFIX);
- log_error(LOG_LEVEL_FRC, "Enforcing request \"%s\".\n", req);
+ log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
csp->force = 1;
}
else
if ((gw = forward_url(http, csp)) == NULL)
{
- log_error(LOG_LEVEL_ERROR, "gateway spec is NULL!?!? This can't happen!");
- abort();
+ log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
+ /* Never get here - LOG_LEVEL_FATAL causes program exit */
}
/* build the http request to send to the server
/* decide what we're to do with cookies */
-#if defined(TOGGLE)
- /*
- * by haroon - most of credit to srt19170
- * if toggled_on flag is false IJB is disabled, pass cookies thru
- */
+#ifdef TOGGLE
if (!csp->toggled_on)
{
- csp->accept_server_cookie = 1;
- csp->send_user_cookie = 1;
- }
- else
-#endif
-
- if ((cs = cookie_url(http, csp)))
- {
- csp->accept_server_cookie = cs->accept_server_cookie;
- csp->send_user_cookie = cs->send_user_cookie;
+ /* Most compatible set of permissions */
+ csp->permissions = PERMIT_COOKIE_SET | PERMIT_COOKIE_READ | PERMIT_POPUPS;
}
else
{
- csp->accept_server_cookie = 0;
- csp->send_user_cookie = 0;
+ csp->permissions = url_permissions(http, csp);
}
+#else /* ifndef TOGGLE */
+ csp->permissions = url_permissions(http, csp);
+#endif /* ndef TOGGLE */
+
+#ifdef KILLPOPUPS
+ block_popups = ((csp->permissions & PERMIT_POPUPS) == 0);
+#endif /* def KILLPOPUPS */
+#ifdef PCRS
+ pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
+ ((csp->permissions & PERMIT_RE_FILTER) != 0);
+#endif /* def PCRS */
+
/* grab the rest of the client's headers */
destroy_list(csp->headers);
-#ifdef TOGGLE
- /*
- * by haroon - most of credit to srt19170
- * if toggled_on flag is true then IJB is enabled, do the usual
- * otherwise avoid crunching
- */
-
-/* This next line is a little ugly, but it simplifies the if statement below. */
-/* Basically if TOGGLE, then we want the if to test "csp->toggled_on", else we don't */
-#define IS_TOGGLED_ON csp->toggled_on &&
-
-#else /* ifndef TOGGLE */
-
-/* We don't have TOGGLE, so we don't care about toggling. */
-#define IS_TOGGLED_ON
-
-#endif /* ndef TOGGLE */
-
-
-#ifdef TRUST_FILES
-/* This next line is a little ugly, but it simplifies the if statement below. */
-/* Basically if TRUST_FILES, then we want the if to call "trust_url", else we don't */
-#define IS_TRUSTED_URL (p = trust_url(http, csp)) ||
-
-#else /* ifndef TRUST_FILES */
-
-/* We don't have TRUST_FILES, so we don't care about trusted URL's. */
-#define IS_TRUSTED_URL
-
-#endif /* ndef TRUST_FILES */
-
-
/* Check the request against all rules, unless
- * we're disabled or in force mode.
+ * we're toggled off or in force mode.
*/
if (IS_TOGGLED_ON
#endif /* def FORCE_LOAD */
( (p = intercept_url(http, csp)) ||
IS_TRUSTED_URL
- (p = block_url(http, csp)) ))
+ (p = block_url(http, csp))
+#ifdef FAST_REDIRECTS
+ || (fast_redirects && (p = redirect_url(http, csp)))
+#endif /* def FAST_REDIRECTS */
+ ))
{
#ifdef STATISTICS
csp->rejected = 1;
log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
#if defined(DETECT_MSIE_IMAGES) || defined(USE_IMAGE_LIST)
- /* now use block_imageurl */
+ /* Block as image? */
if ( (tinygif > 0) && block_imageurl(http, csp) )
{
/* Send "blocked" image */
log_error(LOG_LEVEL_GPC, "%s%s image crunch!",
http->hostport, http->path);
+ if ((tinygif == 2) || strstr(http->path, "ijb-send-banner"))
+ {
+ write_socket(csp->cfd, JBGIF, sizeof(JBGIF)-1);
+ }
if (tinygif == 1)
{
write_socket(csp->cfd, BLANKGIF, sizeof(BLANKGIF)-1);
}
else if ((tinygif == 3) && (tinygifurl))
{
- write_socket(csp->cfd, FWGIF, sizeof(FWGIF)-1);
- write_socket(csp->cfd, tinygifurl, strlen(tinygifurl));
+ p = (char *)malloc(strlen(HTTP_REDIRECT_TEMPLATE) + strlen(tinygifurl));
+ sprintf(p, HTTP_REDIRECT_TEMPLATE, tinygifurl);
+ write_socket(csp->cfd, p, strlen(p));
}
else
{
}
else
#endif /* defined(DETECT_MSIE_IMAGES) || defined(USE_IMAGE_LIST) */
+ /* Block as HTML */
{
- /* Send HTML "blocked" message */
+ /* Send HTML "blocked" message, interception, or redirection result */
write_socket(csp->cfd, p, strlen(p));
}
#ifdef KILLPOPUPS
/* Filter the popups on this read. */
- if ( IS_TOGGLED_ON
- ( kill_all_popups ||
- ( ( http->host != NULL ) && ( popupfile != NULL ) ) ) )
+ if (block_popups_now)
{
- filter_popups(csp, http->host, buf, n);
+ filter_popups(buf, n);
}
#endif /* def KILLPOPUPS */
* may be in the buffer)
*/
+#ifdef KILLPOPUPS
+ /* Start blocking popups if appropriate. */
+
+ if (csp->is_text && /* It's a text / * MIME-Type */
+ !http->ssl && /* We talk plaintext */
+ block_popups)
+ {
+ block_popups_now = 1;
+ }
+
+#endif /* def KILLPOPUPS */
+
#ifdef PCRS
- /* Decide if we want to re_filter this. */
+ /* Start re_filtering this if appropriate. */
- if (IS_TOGGLED_ON /* Only filter if toggle is "on" */
- csp->is_text && /* It's a text / * MIME-Type */
- re_filterfile && /* There are expressions to be used */
+ if (csp->is_text && /* It's a text / * MIME-Type */
!http->ssl && /* We talk plaintext */
- (re_filter_all || !csp->send_user_cookie)) /* Policy allows */
+ pcrs_filter) /* Policy allows */
{
filtering = 1;
}
* Returns : N/A
*
*********************************************************************/
+#ifdef AMIGA
+void serve(struct client_state *csp)
+#else /* ifndef AMIGA */
static void serve(struct client_state *csp)
+#endif /* def AMIGA */
{
chat(csp);
close_socket(csp->cfd);
#endif
{
configfile =
-#ifndef _WIN32
+#ifdef AMIGA
+ "AmiTCP:db/junkbuster.config"
+#elif !defined(_WIN32)
"config"
#else
"junkbstr.txt"
}
#endif /* !defined(_WIN32) || defined(_WIN_CONSOLE) */
+#ifdef AMIGA
+ InitAmiga();
+#endif
+
Argc = argc;
Argv = argv;
if (bfd < 0)
{
- log_error(LOG_LEVEL_ERROR, "can't bind %s:%d: %E "
+ log_error(LOG_LEVEL_FATAL, "can't bind %s:%d: %E "
"- There may be another junkbuster or some other "
"proxy running on port %d",
(NULL != haddr) ? haddr : "INADDR_ANY", hport, hport
);
+ /* shouldn't get here */
return;
}
if (run_loader(csp))
{
- log_error(LOG_LEVEL_ERROR, "a loader failed - must exit");
- return;
+ log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
+ /* Never get here - LOG_LEVEL_FATAL causes program exit */
}
if (multi_threaded)
projects / privoxy.git / blobdiff